<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

  <style>
    div{
      width: 200px;
      height: 200px;
      text-align: center;
      border: 1px solid red;
      background-color: green;
      background-image: url("https://cdn.tmooc.cn/bsfile//courseImg///bc2fba8192344fb2937f95df65d2b729.jpg");
      background-size:100px 100px ;
      /*background-size:100% 100% ;*/

      background-repeat: no-repeat;
      background-position: 30px 50px;
      background-position: center;

      background: pink url("../web-day01/a.jpg") no-repeat center;
    }
  </style>
</head>
<body>
<div>小艺</div>
</body>
</html>